If anyone was ever thinking of running something stiffer than the rubber WRX mounts that come with the kit ... don't even bother trying.
Took me two minutes of run time to figure it out.
edit:
Anchor 9024 is what is included in the KPower mount kit
Anchor 9023 is also listed for a WRX, it is what some refer to as "STI Mounts". They're larger than the 9024 and you have to run the drivers side flipped to clear the oil pan.
Probably just buy the 9024 if replacing the mounts.